WO2021075146A1 - Optical transmission system - Google Patents

Optical transmission system Download PDF

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Publication number
WO2021075146A1
WO2021075146A1 PCT/JP2020/031397 JP2020031397W WO2021075146A1 WO 2021075146 A1 WO2021075146 A1 WO 2021075146A1 JP 2020031397 W JP2020031397 W JP 2020031397W WO 2021075146 A1 WO2021075146 A1 WO 2021075146A1
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WO
WIPO (PCT)
Prior art keywords
light
signal
optical fiber
transmission system
power
Prior art date
Application number
PCT/JP2020/031397
Other languages
French (fr)
Japanese (ja)
Inventor
秀一 玉手
Original Assignee
京セラ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Priority to EP20876875.4A priority Critical patent/EP3926863B1/en
Priority to US17/442,121 priority patent/US11381320B2/en
Priority to CN202080018874.3A priority patent/CN113557679B/en
Publication of WO2021075146A1 publication Critical patent/WO2021075146A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/806—Arrangements for feeding power
    • H04B10/807—Optical power feeding, i.e. transmitting power using an optical signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0221—Power control, e.g. to keep the total optical power constant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/05—Spatial multiplexing systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating

Definitions

  • This disclosure relates to optical transmission.
  • Patent Document 1 describes an optical transmitter that transmits signal light modulated by an electric signal and feed light for supplying power, a core that transmits the signal light, and a core formed around the core.
  • An optical fiber having a first clad having a small refractive index and transmitting the feeding light and a second clad formed around the first clad and having a smaller refractive index than the first clad, and a first clad of the optical fiber are used for transmission.
  • an optical communication device including an optical receiver that operates with the converted power of the fed light and converts the signal light transmitted by the core of the optical fiber into the electric signal.
  • Optical transmission systems are required to further improve communication speed.
  • the optical transmission system of one aspect of the present disclosure is An optical transmission system including a plurality of light supply devices for outputting signal light, a plurality of light receiving devices for receiving signal light, and an optical fiber cable for transmitting signal light.
  • a plurality of signal lights having different signals output from the plurality of light supply devices are received by the plurality of light receiving devices through a single core or cladding of the optical fiber cable, and MIMO communication is performed.
  • the optical fiber transmission system 1A of the present embodiment includes a power supply device (PSE: Power Sourcing Equipment) 110, an optical fiber cable 200A, and a power receiving device (PD: Powered Device) 310.
  • the power feeding device in the present disclosure is a device that converts electric power into light energy and supplies it, and a power receiving device is a device that receives the supply of light energy and converts the light energy into electric power.
  • the power feeding device 110 includes a power feeding semiconductor laser 111.
  • the optical fiber cable 200A includes an optical fiber 250A that forms a transmission line for feeding light.
  • the power receiving device 310 includes a photoelectric conversion element 311.
  • the power feeding device 110 is connected to a power source, and a power feeding semiconductor laser 111 or the like is electrically driven.
  • the power feeding semiconductor laser 111 oscillates with the electric power from the power source and outputs the power feeding light 112.
  • one end 201A can be connected to the power feeding device 110, and the other end 202A can be connected to the power receiving device 310 to transmit the feeding light 112.
  • the power feeding light 112 from the power feeding device 110 is input to one end 201A of the optical fiber cable 200A, the feeding light 112 propagates in the optical fiber 250A, and is output from the other end 202A to the power receiving device 310.
  • the photoelectric conversion element 311 converts the power feeding light 112 transmitted through the optical fiber cable 200A into electric power.
  • the electric power converted by the photoelectric conversion element 311 is used as the driving power required in the power receiving device 310. Further, the power receiving device 310 can output the electric power converted by the photoelectric conversion element 311 for an external device.
  • the semiconductor material constituting the semiconductor region that exerts the light-electric conversion effect of the power feeding semiconductor laser 111 and the photoelectric conversion element 311 is a semiconductor having a short wavelength laser wavelength of 500 nm or less. Since a semiconductor having a short wavelength laser wavelength has a large band gap and high photoelectric conversion efficiency, the photoelectric conversion efficiency on the power generation side and the power receiving side of optical power supply is improved, and the optical power supply efficiency is improved.
  • the semiconductor material for example, a semiconductor material of a laser medium having a laser wavelength (fundamental wave) of 200 to 500 nm, such as diamond, gallium oxide, aluminum nitride, and GaN, may be used.
  • a semiconductor having a band gap of 2.4 eV or more is applied as the semiconductor material.
  • a semiconductor material of a laser medium having a bandgap of 2.4 to 6.2 eV such as diamond, gallium oxide, aluminum nitride, and GaN, may be used.
  • a semiconductor material of a laser medium having a laser wavelength (fundamental wave) smaller than 200 nm may be used.
  • These semiconductor materials may be applied to either one of the power feeding semiconductor laser 111 and the photoelectric conversion element 311. The photoelectric conversion efficiency on the power feeding side or the power receiving side is improved, and the optical power feeding efficiency is improved.
  • the optical fiber transmission system 1 of the present embodiment includes a power supply system via an optical fiber and an optical communication system, and is a first data communication including a power supply device (PSE: Power Sourcing Equipment) 110. It includes a device 100, an optical fiber cable 200, and a second data communication device 300 including a power receiving device (PD) 310.
  • the power feeding device 110 includes a power feeding semiconductor laser 111.
  • the first data communication device 100 includes a power supply device 110, a transmission unit 120 that performs data communication, and a reception unit 130.
  • the first data communication device 100 corresponds to a data terminal equipment (DTE (Data Terminal Equipment)), a repeater (Repeater), and the like.
  • the transmitter 120 includes a signal semiconductor laser 121 and a modulator 122.
  • the receiving unit 130 includes a signal photodiode 131.
  • the optical fiber cable 200 includes a core 210 forming a signal light transmission path, a clad 220 arranged on the outer periphery of the core 210 and forming a feeding light transmission path, and an optical fiber 250 having the core 210.
  • the power receiving device 310 includes a photoelectric conversion element 311.
  • the second data communication device 300 includes a power receiving device 310, a transmitting unit 320, a receiving unit 330, and a data processing unit 340.
  • the second data communication device 300 is a power end station. Etc.
  • the transmitter 320 includes a signal semiconductor laser 321 and a modulator 322.
  • the receiving unit 330 includes a signal photodiode 331.
  • the data processing unit 340 is a unit that processes a received signal.
  • the second data communication device 300 is a node in the power supply network. Alternatively, the second data communication device 300 may be a node that communicates with another node.
  • the first data communication device 100 is connected to a power source, and a power feeding semiconductor laser 111, a signal semiconductor laser 121, a modulator 122, a signal photodiode 131, and the like are electrically driven.
  • the first data communication device 100 is a node in the power supply network.
  • the first data communication device 100 may be a node that communicates with another node.
  • the power feeding semiconductor laser 111 oscillates with the electric power from the power source and outputs the power feeding light 112.
  • the photoelectric conversion element 311 converts the power feeding light 112 transmitted through the optical fiber cable 200 into electric power.
  • the electric power converted by the photoelectric conversion element 311 is the driving power of the transmitting unit 320, the receiving unit 330, and the data processing unit 340, and other driving power required in the second data communication device 300.
  • the second data communication device 300 may be capable of outputting the electric power converted by the photoelectric conversion element 311 for an external device.
  • the modulator 122 of the transmitting unit 120 modulates the laser light 123 from the signal semiconductor laser 121 based on the transmission data 124 and outputs it as the signal light 125.
  • the signal photodiode 331 of the receiving unit 330 demodulates the signal light 125 transmitted through the optical fiber cable 200 into an electric signal and outputs it to the data processing unit 340.
  • the data processing unit 340 transmits the data obtained by the electric signal to the node, while receiving the data from the node and outputting the data as the transmission data 324 to the modulator 322.
  • the modulator 322 of the transmitting unit 320 modulates the laser light 323 from the signal semiconductor laser 321 based on the transmission data 324 and outputs it as the signal light 325.
  • the signal photodiode 131 of the receiving unit 130 demodulates the signal light 325 transmitted through the optical fiber cable 200 into an electric signal and outputs it.
  • the data by the electric signal is transmitted to the node, while the data from the node is referred to as transmission data 124.
  • the feed light 112 and the signal light 125 from the first data communication device 100 are input to one end 201 of the optical fiber cable 200, the feed light 112 propagates through the clad 220, the signal light 125 propagates through the core 210, and the other end. It is output from 202 to the second data communication device 300.
  • the signal light 325 from the second data communication device 300 is input to the other end 202 of the optical fiber cable 200, propagates through the core 210, and is output from one end 201 to the first data communication device 100.
  • the first data communication device 100 is provided with an optical input / output unit 140 and an optical connector 141 attached to the optical input / output unit 140.
  • the second data communication device 300 is provided with an optical input / output unit 350 and an optical connector 351 attached to the optical input / output unit 350.
  • An optical connector 230 provided at one end 201 of the optical fiber cable 200 connects to the optical connector 141.
  • An optical connector 240 provided at the other end 202 of the optical fiber cable 200 connects to the optical connector 351.
  • the optical input / output unit 140 guides the feeding light 112 to the clad 220, guides the signal light 125 to the core 210, and guides the signal light 325 to the receiving unit 130.
  • the optical input / output unit 350 guides the feeding light 112 to the power receiving device 310, guides the signal light 125 to the receiving unit 330, and guides the signal light 325 to the core 210.
  • the optical fiber cable 200 has one end 201 connectable to the first data communication device 100 and the other end 202 connectable to the second data communication device 300 to transmit the feeding light 112. Further, in the present embodiment, the optical fiber cable 200 transmits the signal lights 125 and 325 in both directions.
  • the semiconductor material constituting the semiconductor region that exerts the light-electricity conversion effect of the power feeding semiconductor laser 111 and the photoelectric conversion element 311 As the semiconductor material constituting the semiconductor region that exerts the light-electricity conversion effect of the power feeding semiconductor laser 111 and the photoelectric conversion element 311, the same materials as those in the first embodiment are applied, and high light power feeding efficiency is realized. ..
  • an optical fiber 260 for transmitting signal light and an optical fiber 270 for transmitting feed light may be provided separately.
  • the optical fiber cable 200B may also be composed of a plurality of cables.
  • FIG. 5 is a configuration diagram of the optical fiber transmission system 1C of the third embodiment
  • FIG. 6 is a schematic diagram for explaining an optical fiber cable 200C included in the optical fiber transmission system 1C.
  • the same components as those described above are designated by the same reference numerals, and detailed description thereof will be omitted.
  • the optical fiber transmission system 1C of the third embodiment includes a first data communication device 100C, an optical fiber cable 200C, and a second data communication device 300C.
  • the first data communication device 100C includes three light supply devices 150 and a light supply control unit 160.
  • Each of the three light feeders 150 includes a signal semiconductor laser 121C.
  • the light supply control unit 160 controls three light supply devices 150, modulates the laser light from each signal semiconductor laser 121C, and outputs three signal lights 125C having different signals.
  • the three signal lights 125C are not particularly limited as long as they have signals different from each other, and the signals may be, for example, those generated from a single transmission data. Further, even if each light supply device 150 modulates the laser light from the signal semiconductor laser 121C with a modulator based on the transmission data and outputs the signal light 125C as in the transmission unit 120 in the second embodiment. Good.
  • the three signal lights 125C output from the three light supply devices 150 are output to the optical fiber cable 200C.
  • the optical fiber cable 200C includes an optical fiber 250C.
  • the optical fiber 250C includes a core 210C forming a transmission line for three signal lights 125C and a clad 220 surrounding the core 210C.
  • the core 210C is preferably mixed with a powder material P that diffuses light.
  • the diffusion of the signal light 125C transmitted in the core 210C is promoted, and each signal light 125C is suitably dispersed and received by the three light receiving devices 360 (signal photodiode 331C) of the second data communication device 300C.
  • Both end faces of the optical fiber 250C have a space between the three light supply devices 150 or the three light receiving devices 360, and as shown in FIG.
  • the optical fiber 250C may be capable of transmitting three signal lights 125C by a single core 210C or a clad 220. That is, the transmission lines of the three signal lights 125 may be clad 220.
  • the second data communication device 300C includes three light receiving devices 360 and a data processing unit 340C.
  • Each of the three light receiving devices 360 receives a signal light 325C in which three signal lights 125C from the three light supply devices 150 are distributed through transmission on the optical fiber cable 200C. That is, signal light 325C including three signal lights 125C having different signals is transmitted to each light receiving device 360.
  • the signal photodiode 331C of each light receiving device 360 demodulates the transmitted signal light 325C into an electric signal and outputs it to the data processing unit 340C.
  • the data processing unit 340C Based on the signals input from the three light receiving devices 360, the data processing unit 340C performs signal separation processing by, for example, matrix calculation, and obtains a signal possessed by each signal light 125C output from the three light supply devices 150. If these signals were generated from a single piece of data, the original data is decoded. That is, between the first data communication device 100C and the second data communication device 300C, MIMO (multiple-input and multiple-output) communication is performed using the three light supply devices 150 and the three light receiving devices 360. Will be done. As a result, the communication speed can be improved as compared with the conventional case in which a single light supply device and a light receiving device are used respectively.
  • MIMO multiple-input and multiple-output
  • FIG. 7 is a configuration diagram of the optical fiber transmission system of the fourth embodiment.
  • the same components as those described above are designated by the same reference numerals, and detailed description thereof will be omitted.
  • the optical fiber transmission system 1D of the fourth embodiment is different from the optical fiber transmission system 1C of the third embodiment in that the light to be transmitted is the feeding light and a signal is superimposed on the feeding light.
  • the optical fiber transmission system 1D includes a first data communication device 100D and a second data communication device 300D in addition to the optical fiber cable 200C.
  • the first data communication device 100D includes three light supply devices 150D and a light supply control unit 160D.
  • Each of the three light feeders 150D includes a power feeding semiconductor laser 111D.
  • the light supply control unit 160D controls three light supply devices 150D, modulates the laser light from each of the power feeding semiconductor lasers 111D, and outputs three feeding lights 112D having different signals.
  • the three feeding lights 112D are not particularly limited as long as signals different from each other are superimposed, and the signals may be, for example, those generated from a single transmission data.
  • the three feeding lights 112D output from the three light supply devices 150D are output to the core 210C of the optical fiber cable 200C.
  • the second data communication device 300D includes three light receiving devices 360D, a power synthesis unit 370D, and a data processing unit 340D.
  • Each of the three light receiving devices 360D is input with the feeding light 312D in which the three feeding lights 112D from the three light feeding devices 150D are distributed through the transmission by the optical fiber cable 200C. That is, the feeding light 312D including the three feeding lights 112D on which different signals are superimposed is transmitted to each light receiving device 360D.
  • the photoelectric conversion element 311D of each light receiving device 360D converts the transmitted feed light 312D into electric power.
  • the power synthesis unit 370D synthesizes the power converted from the feed light 312D by the three light receiving devices 360D (photoelectric conversion element 311D) and supplies the power to the load.
  • the load may be each device in the second data communication device 300D, or may be an external device.
  • the data processing unit 340D demodulates the three feeding lights 312D and acquires the three superimposed signals (information). Then, the data processing unit 340D performs signal separation processing by, for example, matrix calculation based on the acquired signal, and obtains a signal superimposed on each feeding light 112D output from the three light supply devices 150D. That is, between the first data communication device 100D and the second data communication device 300D, MIMO communication is performed while supplying power using three light supply devices 150D and three light receiving devices 360D. As a result, data communication can be performed without using a communication system while increasing the amount of power supply as compared with the case where a single light supply device and light receiving device are used.
  • this embodiment is shown as an example, and can be implemented in various other embodiments, and components are omitted as long as the gist of the invention is not deviated. , Can be replaced or changed.
  • three light supply devices and three light receiving devices are provided, but the number of the light supply device and the light receiving device is not particularly limited. However, it is preferable that these quantities correspond to each other.
  • the optical transmission system according to the present invention is useful for improving the communication speed as compared with the conventional one.
  • Optical fiber transmission system 1A Optical fiber transmission system (optical transmission system) 1 Optical fiber transmission system (optical transmission system) 1B Optical fiber transmission system (optical transmission system) 1C optical fiber transmission system (optical transmission system) 1D optical fiber transmission system (optical transmission system) 100 First data communication device 100C First data communication device 100D First data communication device 111 Power supply semiconductor laser 111D Power supply semiconductor laser 112 Power supply light 112D Power supply light 121 Signal semiconductor laser 121C Signal semiconductor laser 125 Signal light 125C signal light 150 light supply device 150D light supply device 160 light supply control unit 160D light supply control unit 200 optical fiber cable 200A optical fiber cable 200B optical fiber cable 200C optical fiber cable 210 core 210C core 250 optical fiber 250A optical fiber 250C optical fiber 300 second data communication device 300C Second data communication device 300D Second data communication device 311 Photoelectric conversion element 311D Photoelectric conversion element 312D Feed light 325 Signal light 325C Signal light 331 Signal photodiode 331C Signal photodiode 340 Data

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Communication System (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

An optical fiber transmission system 1C comprises: a plurality of light supply devices 150 that output signal lights; a plurality of light reception devices 360 that receive the signal lights; and an optical fiber cable 200C that transmits the signal lights. The plurality of signal lights that are outputted from the plurality of light supply devices 150 and have different signals from one another pass through a simplex core or cladding of the optical fiber cable 200C and are received by the plurality of light reception devices 360, and MIMO communication is thus performed.

Description

光伝送システムOptical transmission system
　本開示は、光伝送に関する。 This disclosure relates to optical transmission.
　近時、電力を光（給電光と呼ばれる）に変換して伝送し、当該給電光を電気エネルギーに変換して電力として利用する光伝送システムが研究されている。
　特許文献１には、電気信号で変調された信号光、及び電力を供給するための給電光を発信する光発信機と、上記信号光を伝送するコア、上記コアの周囲に形成され上記コアより屈折率が小さく上記給電光を伝送する第１クラッド、及び上記第１クラッドの周囲に形成され上記第１クラッドより屈折率が小さい第２クラッド、を有する光ファイバーと、上記光ファイバーの第１クラッドで伝送された上記給電光を変換した電力で動作し、上記光ファイバーのコアで伝送された上記信号光を上記電気信号に変換する光受信機と、を備えた光通信装置が記載されている。 Recently, an optical transmission system in which electric power is converted into light (called feed light) and transmitted, and the feed light is converted into electric energy and used as electric power has been studied.
Patent Document 1 describes an optical transmitter that transmits signal light modulated by an electric signal and feed light for supplying power, a core that transmits the signal light, and a core formed around the core. An optical fiber having a first clad having a small refractive index and transmitting the feeding light and a second clad formed around the first clad and having a smaller refractive index than the first clad, and a first clad of the optical fiber are used for transmission. Described is an optical communication device including an optical receiver that operates with the converted power of the fed light and converts the signal light transmitted by the core of the optical fiber into the electric signal.
特開２０１０－１３５９８９号公報Japanese Unexamined Patent Publication No. 2010-135998
　光伝送システムでは、より一層の通信速度の向上が求められている。 Optical transmission systems are required to further improve communication speed.
　本開示の１つの態様の光伝送システムは、
　信号光を出力する複数の給光装置と、信号光を受ける複数の受光装置と、信号光を伝送する光ファイバーケーブルと、を備える光伝送システムであって、
　前記複数の給光装置から出力させた互いに異なる信号を有する複数の信号光を、前記光ファイバーケーブルの単一のコア又はクラッドを通じて前記複数の受光装置で受けて、ＭＩＭＯ通信を行う。 The optical transmission system of one aspect of the present disclosure is
An optical transmission system including a plurality of light supply devices for outputting signal light, a plurality of light receiving devices for receiving signal light, and an optical fiber cable for transmitting signal light.
A plurality of signal lights having different signals output from the plurality of light supply devices are received by the plurality of light receiving devices through a single core or cladding of the optical fiber cable, and MIMO communication is performed.
本開示の第１実施形態に係る光ファイバー伝送システムの構成図である。It is a block diagram of the optical fiber transmission system which concerns on 1st Embodiment of this disclosure. 本開示の第２実施形態に係る光ファイバー伝送システムの構成図である。It is a block diagram of the optical fiber transmission system which concerns on 2nd Embodiment of this disclosure. 本開示の第２実施形態に係る光ファイバー伝送システムの構成図であって、光コネクタ等を図示したものである。It is a block diagram of the optical fiber transmission system which concerns on 2nd Embodiment of this disclosure, and is the figure which showed the optical connector and the like. 本開示の他の一実施形態に係る光ファイバー伝送システムの構成図である。It is a block diagram of the optical fiber transmission system which concerns on another Embodiment of this disclosure. 本開示の第３実施形態に係る光ファイバー伝送システムの構成図である。It is a block diagram of the optical fiber transmission system which concerns on 3rd Embodiment of this disclosure. 本開示の第３実施形態に係る光ファイバー伝送システムが備える光ファイバーケーブルを説明するための模式図である。It is a schematic diagram for demonstrating the optical fiber cable provided in the optical fiber transmission system which concerns on 3rd Embodiment of this disclosure. 本開示の第４実施形態に係る光ファイバー伝送システムの構成図である。It is a block diagram of the optical fiber transmission system which concerns on 4th Embodiment of this disclosure.
　以下に本開示の一実施形態につき図面を参照して説明する。 An embodiment of the present disclosure will be described below with reference to the drawings.
〔第１実施形態〕
　図１に示すように、本実施形態の光ファイバー伝送システム１Ａは、給電装置（PSE:Power Sourcing Equipment）１１０と、光ファイバーケーブル２００Ａと、受電装置（PD:Powered Device）３１０を備える。
　なお、本開示における給電装置は電力を光エネルギーに変換して供給する装置であり、受電装置は光エネルギーの供給を受け当該光エネルギーを電力に変換する装置である。
　給電装置１１０は、給電用半導体レーザー１１１を含む。
　光ファイバーケーブル２００Ａは、給電光の伝送路を形成する光ファイバー２５０Ａを含む。
　受電装置３１０は、光電変換素子３１１を含む。 [First Embodiment]
As shown in FIG. 1, the optical fiber transmission system 1A of the present embodiment includes a power supply device (PSE: Power Sourcing Equipment) 110, an optical fiber cable 200A, and a power receiving device (PD: Powered Device) 310.
The power feeding device in the present disclosure is a device that converts electric power into light energy and supplies it, and a power receiving device is a device that receives the supply of light energy and converts the light energy into electric power.
The power feeding device 110 includes a power feeding semiconductor laser 111.
The optical fiber cable 200A includes an optical fiber 250A that forms a transmission line for feeding light.
The power receiving device 310 includes a photoelectric conversion element 311.
　給電装置１１０は電源に接続され、給電用半導体レーザー１１１等が電気駆動される。
　給電用半導体レーザー１１１は、上記電源からの電力によりレーザー発振して給電光１１２を出力する。 The power feeding device 110 is connected to a power source, and a power feeding semiconductor laser 111 or the like is electrically driven.
The power feeding semiconductor laser 111 oscillates with the electric power from the power source and outputs the power feeding light 112.
　光ファイバーケーブル２００Ａは、一端２０１Ａが給電装置１１０に接続可能とされ、他端２０２Ａが受電装置３１０に接続可能とされ、給電光１１２を伝送する。
　給電装置１１０からの給電光１１２が、光ファイバーケーブル２００Ａの一端２０１Ａに入力され、給電光１１２は光ファイバー２５０Ａ中を伝搬し、他端２０２Ａから受電装置３１０に出力される。 In the optical fiber cable 200A, one end 201A can be connected to the power feeding device 110, and the other end 202A can be connected to the power receiving device 310 to transmit the feeding light 112.
The power feeding light 112 from the power feeding device 110 is input to one end 201A of the optical fiber cable 200A, the feeding light 112 propagates in the optical fiber 250A, and is output from the other end 202A to the power receiving device 310.
　光電変換素子３１１は、光ファイバーケーブル２００Ａを通して伝送されてきた給電光１１２を電力に変換する。光電変換素子３１１により変換された電力が、受電装置３１０内で必要な駆動電力とされる。さらに受電装置３１０は光電変換素子３１１により変換された電力を外部機器用に出力可能とされる。 The photoelectric conversion element 311 converts the power feeding light 112 transmitted through the optical fiber cable 200A into electric power. The electric power converted by the photoelectric conversion element 311 is used as the driving power required in the power receiving device 310. Further, the power receiving device 310 can output the electric power converted by the photoelectric conversion element 311 for an external device.
　給電用半導体レーザー１１１及び光電変換素子３１１の光‐電気間の変換効果を奏する半導体領域を構成する半導体材料が５００ｎｍ以下の短波長のレーザー波長をもった半導体とされる。
　短波長のレーザー波長をもった半導体は、バンドギャップが大きく光電変換効率が高いので、光給電の発電側及び受電側における光電変換効率が向上され、光給電効率が向上する。
　そのためには、同半導体材料として、例えば、ダイヤモンド、酸化ガリウム、窒化アルミニウム、ＧａＮ等、レーザー波長（基本波）が２００～５００ｎｍのレーザー媒体の半導体材料を用いてもよい。
　また、同半導体材料として、２．４ｅＶ以上のバンドギャップを有した半導体が適用される。
　例えば、ダイヤモンド、酸化ガリウム、窒化アルミニウム、ＧａＮ等、バンドギャップ２．４～６．２ｅＶのレーザー媒体の半導体材料を用いてもよい。
　なお、レーザー光は長波長ほど伝送効率が良く、短波長ほど光電変換効率が良い傾向にある。したがって、長距離伝送の場合には、レーザー波長（基本波）が５００ｎｍより大きいレーザー媒体の半導体材料を用いてもよい。また、光電変換効率を優先する場合には、レーザー波長（基本波）が２００ｎｍより小さいレーザー媒体の半導体材料を用いてもよい。
　これらの半導体材料は、給電用半導体レーザー１１１及び光電変換素子３１１のいずれか一方に適用してもよい。給電側又は受電側における光電変換効率が向上され、光給電効率が向上する。 The semiconductor material constituting the semiconductor region that exerts the light-electric conversion effect of the power feeding semiconductor laser 111 and the photoelectric conversion element 311 is a semiconductor having a short wavelength laser wavelength of 500 nm or less.
Since a semiconductor having a short wavelength laser wavelength has a large band gap and high photoelectric conversion efficiency, the photoelectric conversion efficiency on the power generation side and the power receiving side of optical power supply is improved, and the optical power supply efficiency is improved.
For that purpose, as the semiconductor material, for example, a semiconductor material of a laser medium having a laser wavelength (fundamental wave) of 200 to 500 nm, such as diamond, gallium oxide, aluminum nitride, and GaN, may be used.
Further, as the semiconductor material, a semiconductor having a band gap of 2.4 eV or more is applied.
For example, a semiconductor material of a laser medium having a bandgap of 2.4 to 6.2 eV, such as diamond, gallium oxide, aluminum nitride, and GaN, may be used.
The longer the wavelength of the laser light, the better the transmission efficiency, and the shorter the wavelength, the better the photoelectric conversion efficiency. Therefore, in the case of long-distance transmission, a semiconductor material of a laser medium having a laser wavelength (primary wave) larger than 500 nm may be used. When the photoelectric conversion efficiency is prioritized, a semiconductor material of a laser medium having a laser wavelength (fundamental wave) smaller than 200 nm may be used.
These semiconductor materials may be applied to either one of the power feeding semiconductor laser 111 and the photoelectric conversion element 311. The photoelectric conversion efficiency on the power feeding side or the power receiving side is improved, and the optical power feeding efficiency is improved.
〔第２実施形態〕
　図２に示すように本実施形態の光ファイバー伝送システム１は、光ファイバーを介した給電システムと光通信システムとを含むものであり、給電装置（PSE:Power Sourcing Equipment）１１０を含む第１のデータ通信装置１００と、光ファイバーケーブル２００と、受電装置（PD:Powered Device）３１０を含む第２のデータ通信装置３００とを備える。
　給電装置１１０は、給電用半導体レーザー１１１を含む。第１のデータ通信装置１００は、給電装置１１０のほか、データ通信を行う発信部１２０と、受信部１３０とを含む。第１のデータ通信装置１００は、データ端末装置(DTE(Data Terminal Equipment))、中継器(Repeater)等に相当する。発信部１２０は、信号用半導体レーザー１２１と、モジュレーター１２２とを含む。受信部１３０は、信号用フォトダイオード１３１を含む。 [Second Embodiment]
As shown in FIG. 2, the optical fiber transmission system 1 of the present embodiment includes a power supply system via an optical fiber and an optical communication system, and is a first data communication including a power supply device (PSE: Power Sourcing Equipment) 110. It includes a device 100, an optical fiber cable 200, and a second data communication device 300 including a power receiving device (PD) 310.
The power feeding device 110 includes a power feeding semiconductor laser 111. The first data communication device 100 includes a power supply device 110, a transmission unit 120 that performs data communication, and a reception unit 130. The first data communication device 100 corresponds to a data terminal equipment (DTE (Data Terminal Equipment)), a repeater (Repeater), and the like. The transmitter 120 includes a signal semiconductor laser 121 and a modulator 122. The receiving unit 130 includes a signal photodiode 131.
　光ファイバーケーブル２００は、信号光の伝送路を形成するコア２１０と、コア２１０の外周に配置され、給電光の伝送路を形成するクラッド２２０と有する光ファイバー２５０を含む。 The optical fiber cable 200 includes a core 210 forming a signal light transmission path, a clad 220 arranged on the outer periphery of the core 210 and forming a feeding light transmission path, and an optical fiber 250 having the core 210.
　受電装置３１０は、光電変換素子３１１を含む。第２のデータ通信装置３００は、受電装置３１０のほか、発信部３２０と、受信部３３０と、データ処理ユニット３４０とを含む。第２のデータ通信装置３００は、パワーエンドステーション(Power End Station)
等に相当する。発信部３２０は、信号用半導体レーザー３２１と、モジュレーター３２２とを含む。受信部３３０は、信号用フォトダイオード３３１を含む。データ処理ユニット３４０は、受信した信号を処理するユニットである。また、第２のデータ通信装置３００は、給電ネットワークにおけるノードである。または第２のデータ通信装置３００は、他のノードと通信するノードでもよい。 The power receiving device 310 includes a photoelectric conversion element 311. The second data communication device 300 includes a power receiving device 310, a transmitting unit 320, a receiving unit 330, and a data processing unit 340. The second data communication device 300 is a power end station.
Etc. The transmitter 320 includes a signal semiconductor laser 321 and a modulator 322. The receiving unit 330 includes a signal photodiode 331. The data processing unit 340 is a unit that processes a received signal. The second data communication device 300 is a node in the power supply network. Alternatively, the second data communication device 300 may be a node that communicates with another node.
　第１のデータ通信装置１００は電源に接続され、給電用半導体レーザー１１１、信号用半導体レーザー１２１と、モジュレーター１２２、信号用フォトダイオード１３１等が電気駆動される。また、第１のデータ通信装置１００は、給電ネットワークにおけるノードである。または第１のデータ通信装置１００は、他のノードと通信するノードでもよい。
　給電用半導体レーザー１１１は、上記電源からの電力によりレーザー発振して給電光１１２を出力する。 The first data communication device 100 is connected to a power source, and a power feeding semiconductor laser 111, a signal semiconductor laser 121, a modulator 122, a signal photodiode 131, and the like are electrically driven. The first data communication device 100 is a node in the power supply network. Alternatively, the first data communication device 100 may be a node that communicates with another node.
The power feeding semiconductor laser 111 oscillates with the electric power from the power source and outputs the power feeding light 112.
　光電変換素子３１１は、光ファイバーケーブル２００を通して伝送されてきた給電光１１２を電力に変換する。光電変換素子３１１により変換された電力は、発信部３２０、受信部３３０及びデータ処理ユニット３４０の駆動電力、その他の第２のデータ通信装置３００内で必要となる駆動電力とされる。さらに第２のデータ通信装置３００は、光電変換素子３１１により変換された電力を外部機器用に出力可能とされていてもよい。 The photoelectric conversion element 311 converts the power feeding light 112 transmitted through the optical fiber cable 200 into electric power. The electric power converted by the photoelectric conversion element 311 is the driving power of the transmitting unit 320, the receiving unit 330, and the data processing unit 340, and other driving power required in the second data communication device 300. Further, the second data communication device 300 may be capable of outputting the electric power converted by the photoelectric conversion element 311 for an external device.
　一方、発信部１２０のモジュレーター１２２は、信号用半導体レーザー１２１からのレーザー光１２３を送信データ１２４に基づき変調して信号光１２５として出力する。
　受信部３３０の信号用フォトダイオード３３１は、光ファイバーケーブル２００を通して伝送されてきた信号光１２５を電気信号に復調し、データ処理ユニット３４０に出力する。データ処理ユニット３４０は、当該電気信号によるデータをノードに送信し、その一方で当該ノードからデータを受信し、送信データ３２４としてモジュレーター３２２に出力する。
　発信部３２０のモジュレーター３２２は、信号用半導体レーザー３２１からのレーザー光３２３を送信データ３２４に基づき変調して信号光３２５として出力する。
　受信部１３０の信号用フォトダイオード１３１は、光ファイバーケーブル２００を通して伝送されてきた信号光３２５を電気信号に復調し出力する。当該電気信号によるデータがノードに送信され、その一方で当該ノードからデータが送信データ１２４とされる。 On the other hand, the modulator 122 of the transmitting unit 120 modulates the laser light 123 from the signal semiconductor laser 121 based on the transmission data 124 and outputs it as the signal light 125.
The signal photodiode 331 of the receiving unit 330 demodulates the signal light 125 transmitted through the optical fiber cable 200 into an electric signal and outputs it to the data processing unit 340. The data processing unit 340 transmits the data obtained by the electric signal to the node, while receiving the data from the node and outputting the data as the transmission data 324 to the modulator 322.
The modulator 322 of the transmitting unit 320 modulates the laser light 323 from the signal semiconductor laser 321 based on the transmission data 324 and outputs it as the signal light 325.
The signal photodiode 131 of the receiving unit 130 demodulates the signal light 325 transmitted through the optical fiber cable 200 into an electric signal and outputs it. The data by the electric signal is transmitted to the node, while the data from the node is referred to as transmission data 124.
　第１のデータ通信装置１００からの給電光１１２及び信号光１２５が、光ファイバーケーブル２００の一端２０１に入力され、給電光１１２はクラッド２２０を伝搬し、信号光１２５はコア２１０を伝搬し、他端２０２から第２のデータ通信装置３００に出力される。
　第２のデータ通信装置３００からの信号光３２５が、光ファイバーケーブル２００の他端２０２に入力され、コア２１０を伝搬し、一端２０１から第１のデータ通信装置１００に出力される。 The feed light 112 and the signal light 125 from the first data communication device 100 are input to one end 201 of the optical fiber cable 200, the feed light 112 propagates through the clad 220, the signal light 125 propagates through the core 210, and the other end. It is output from 202 to the second data communication device 300.
The signal light 325 from the second data communication device 300 is input to the other end 202 of the optical fiber cable 200, propagates through the core 210, and is output from one end 201 to the first data communication device 100.
　なお、図３に示すように第１のデータ通信装置１００に光入出力部１４０とこれに付設された光コネクタ１４１が設けられる。また、第２のデータ通信装置３００に光入出力部３５０とこれに付設された光コネクタ３５１が設けられる。光ファイバーケーブル２００の一端２０１に設けられた光コネクタ２３０が光コネクタ１４１に接続する。光ファイバーケーブル２００の他端２０２に設けられた光コネクタ２４０が光コネクタ３５１に接続する。光入出力部１４０は、給電光１１２をクラッド２２０に導光し、信号光１２５をコア２１０に導光し、信号光３２５を受信部１３０に導光する。光入出力部３５０は、給電光１１２を受電装置３１０に導光し、信号光１２５を受信部３３０に導光し、信号光３２５をコア２１０に導光する。
　以上のように、光ファイバーケーブル２００は、一端２０１が第１のデータ通信装置１００に接続可能とされ、他端２０２が第２のデータ通信装置３００に接続可能とされ、給電光１１２を伝送する。さらに本実施形態では、光ファイバーケーブル２００は、信号光１２５，３２５を双方向伝送する。 As shown in FIG. 3, the first data communication device 100 is provided with an optical input / output unit 140 and an optical connector 141 attached to the optical input / output unit 140. Further, the second data communication device 300 is provided with an optical input / output unit 350 and an optical connector 351 attached to the optical input / output unit 350. An optical connector 230 provided at one end 201 of the optical fiber cable 200 connects to the optical connector 141. An optical connector 240 provided at the other end 202 of the optical fiber cable 200 connects to the optical connector 351. The optical input / output unit 140 guides the feeding light 112 to the clad 220, guides the signal light 125 to the core 210, and guides the signal light 325 to the receiving unit 130. The optical input / output unit 350 guides the feeding light 112 to the power receiving device 310, guides the signal light 125 to the receiving unit 330, and guides the signal light 325 to the core 210.
As described above, the optical fiber cable 200 has one end 201 connectable to the first data communication device 100 and the other end 202 connectable to the second data communication device 300 to transmit the feeding light 112. Further, in the present embodiment, the optical fiber cable 200 transmits the signal lights 125 and 325 in both directions.
　給電用半導体レーザー１１１及び光電変換素子３１１の光‐電気間の変換効果を奏する半導体領域を構成する半導体材料としては上記第１実施形態と同様のものが適用され、高い光給電効率が実現される。 As the semiconductor material constituting the semiconductor region that exerts the light-electricity conversion effect of the power feeding semiconductor laser 111 and the photoelectric conversion element 311, the same materials as those in the first embodiment are applied, and high light power feeding efficiency is realized. ..
　なお、図４に示す光ファイバー伝送システム１Ｂの光ファイバーケーブル２００Ｂのように、信号光を伝送する光ファイバー２６０と、給電光を伝送する光ファイバー２７０とを別々に設けてもよい。光ファイバーケーブル２００Ｂも複数本で構成してもよい。 Note that, as in the optical fiber cable 200B of the optical fiber transmission system 1B shown in FIG. 4, an optical fiber 260 for transmitting signal light and an optical fiber 270 for transmitting feed light may be provided separately. The optical fiber cable 200B may also be composed of a plurality of cables.
〔第３実施形態〕
　図５は、第３実施形態の光ファイバー伝送システム１Ｃの構成図であり、図６は、光ファイバー伝送システム１Ｃが備える光ファイバーケーブル２００Ｃを説明するための模式図である。図５中、上述したものと同一の構成要素については同一符号を付して詳細な説明を省略する。 [Third Embodiment]
FIG. 5 is a configuration diagram of the optical fiber transmission system 1C of the third embodiment, and FIG. 6 is a schematic diagram for explaining an optical fiber cable 200C included in the optical fiber transmission system 1C. In FIG. 5, the same components as those described above are designated by the same reference numerals, and detailed description thereof will be omitted.
　図５に示すように、第３実施形態の光ファイバー伝送システム１Ｃは、第１のデータ通信装置１００Ｃと、光ファイバーケーブル２００Ｃと、第２のデータ通信装置３００Ｃとを備える。 As shown in FIG. 5, the optical fiber transmission system 1C of the third embodiment includes a first data communication device 100C, an optical fiber cable 200C, and a second data communication device 300C.
　第１のデータ通信装置１００Ｃは、３つの給光装置１５０と、給光制御部１６０とを含む。
　３つの給光装置１５０の各々は、信号用半導体レーザー１２１Ｃを含む。
　給光制御部１６０は、３つの給光装置１５０を制御し、それぞれの信号用半導体レーザー１２１Ｃからのレーザー光を変調して、互いに異なる信号を有する３つの信号光１２５Ｃを出力させる。３つの信号光１２５Ｃは、互いに異なる信号を有するものであれば特に限定されず、その信号は例えば単一の送信データから生成されたものなどであってもよい。また、各給光装置１５０は、上記第２実施形態における発信部１２０のように、信号用半導体レーザー１２１Ｃからのレーザー光を送信データに基づいてモジュレーターで変調して信号光１２５Ｃとして出力してもよい。
　３つの給光装置１５０から出力された３つの信号光１２５Ｃは、光ファイバーケーブル２００Ｃに出力される。 The first data communication device 100C includes three light supply devices 150 and a light supply control unit 160.
Each of the three light feeders 150 includes a signal semiconductor laser 121C.
The light supply control unit 160 controls three light supply devices 150, modulates the laser light from each signal semiconductor laser 121C, and outputs three signal lights 125C having different signals. The three signal lights 125C are not particularly limited as long as they have signals different from each other, and the signals may be, for example, those generated from a single transmission data. Further, even if each light supply device 150 modulates the laser light from the signal semiconductor laser 121C with a modulator based on the transmission data and outputs the signal light 125C as in the transmission unit 120 in the second embodiment. Good.
The three signal lights 125C output from the three light supply devices 150 are output to the optical fiber cable 200C.
　光ファイバーケーブル２００Ｃは、光ファイバー２５０Ｃを含む。光ファイバー２５０Ｃは、３つの信号光１２５Ｃの伝送路を形成するコア２１０Ｃと、コア２１０Ｃの周囲のクラッド２２０とを含む。
　コア２１０Ｃは、図６に示すように、光を拡散させる粉体材料Ｐが混合されているのが好ましい。これにより、コア２１０Ｃ内を伝送する信号光１２５Ｃの拡散を促進させ、各信号光１２５Ｃを第２のデータ通信装置３００Ｃの３つの受光装置３６０（信号用フォトダイオード３３１Ｃ）に好適に分散させて受光させることができる。光ファイバー２５０Ｃの両端面は、３つの給光装置１５０又は３つの受光装置３６０との間に空間を有するが、図３に示したように、ここに光入出力部及び光コネクタを設けてもよい。
　なお、光ファイバー２５０Ｃは、３つの信号光１２５Ｃを単一のコア２１０Ｃ又はクラッド２２０で伝送可能であればよい。つまり３つの信号光１２５の伝送路はクラッド２２０であってもよい。 The optical fiber cable 200C includes an optical fiber 250C. The optical fiber 250C includes a core 210C forming a transmission line for three signal lights 125C and a clad 220 surrounding the core 210C.
As shown in FIG. 6, the core 210C is preferably mixed with a powder material P that diffuses light. As a result, the diffusion of the signal light 125C transmitted in the core 210C is promoted, and each signal light 125C is suitably dispersed and received by the three light receiving devices 360 (signal photodiode 331C) of the second data communication device 300C. Can be made to. Both end faces of the optical fiber 250C have a space between the three light supply devices 150 or the three light receiving devices 360, and as shown in FIG. 3, an optical input / output unit and an optical connector may be provided here. ..
The optical fiber 250C may be capable of transmitting three signal lights 125C by a single core 210C or a clad 220. That is, the transmission lines of the three signal lights 125 may be clad 220.
　第２のデータ通信装置３００Ｃは、図５に示すように、３つの受光装置３６０と、データ処理ユニット３４０Ｃとを含む。
　３つの受光装置３６０の各々には、３つの給光装置１５０からの３つの信号光１２５Ｃが光ファイバーケーブル２００Ｃでの伝送を通じて分散された信号光３２５Ｃが入力される。つまり、各受光装置３６０には、互いに異なる信号を有する３つの信号光１２５Ｃを含んだ信号光３２５Ｃが伝送される。各受光装置３６０の信号用フォトダイオード３３１Ｃは、伝送されてきた信号光３２５Ｃを電気信号に復調し、データ処理ユニット３４０Ｃに出力する。 As shown in FIG. 5, the second data communication device 300C includes three light receiving devices 360 and a data processing unit 340C.
Each of the three light receiving devices 360 receives a signal light 325C in which three signal lights 125C from the three light supply devices 150 are distributed through transmission on the optical fiber cable 200C. That is, signal light 325C including three signal lights 125C having different signals is transmitted to each light receiving device 360. The signal photodiode 331C of each light receiving device 360 demodulates the transmitted signal light 325C into an electric signal and outputs it to the data processing unit 340C.
　データ処理ユニット３４０Ｃは、３つの受光装置３６０から入力された信号に基づいて、例えば行列演算による信号分離処理を行い、３つの給光装置１５０から出力された各信号光１２５Ｃが有する信号を求める。これらの信号が単一のデータから生成されたものであった場合には、この元のデータを復号する。
　すなわち、第１のデータ通信装置１００Ｃと第２のデータ通信装置３００Ｃとの間では、３つの給光装置１５０と３つの受光装置３６０とを用いてＭＩＭＯ（multiple-input and multiple-output）通信が行われる。
　これにより、各々単一の給光装置及び受光装置を用いた従来に比べ、通信速度を向上させることができる。 Based on the signals input from the three light receiving devices 360, the data processing unit 340C performs signal separation processing by, for example, matrix calculation, and obtains a signal possessed by each signal light 125C output from the three light supply devices 150. If these signals were generated from a single piece of data, the original data is decoded.
That is, between the first data communication device 100C and the second data communication device 300C, MIMO (multiple-input and multiple-output) communication is performed using the three light supply devices 150 and the three light receiving devices 360. Will be done.
As a result, the communication speed can be improved as compared with the conventional case in which a single light supply device and a light receiving device are used respectively.
〔第４実施形態〕
　図７は、第４実施形態の光ファイバー伝送システムの構成図である。図７中、上述したものと同一の構成要素については同一符号を付して詳細な説明を省略する。 [Fourth Embodiment]
FIG. 7 is a configuration diagram of the optical fiber transmission system of the fourth embodiment. In FIG. 7, the same components as those described above are designated by the same reference numerals, and detailed description thereof will be omitted.
　図７に示すように、第４実施形態の光ファイバー伝送システム１Ｄは、伝送する光が給電光であり、これに信号を重畳させている点で、第３実施形態の光ファイバー伝送システム１Ｃと異なる。 As shown in FIG. 7, the optical fiber transmission system 1D of the fourth embodiment is different from the optical fiber transmission system 1C of the third embodiment in that the light to be transmitted is the feeding light and a signal is superimposed on the feeding light.
　光ファイバー伝送システム１Ｄは、光ファイバーケーブル２００Ｃのほか、第１のデータ通信装置１００Ｄと、第２のデータ通信装置３００Ｄとを備える。 The optical fiber transmission system 1D includes a first data communication device 100D and a second data communication device 300D in addition to the optical fiber cable 200C.
　第１のデータ通信装置１００Ｄは、３つの給光装置１５０Ｄと、給光制御部１６０Ｄとを含む。
　３つの給光装置１５０Ｄの各々は、給電用半導体レーザー１１１Ｄを含む。
　給光制御部１６０Ｄは、３つの給光装置１５０Ｄを制御し、それぞれの給電用半導体レーザー１１１Ｄからのレーザー光を変調して、互いに異なる信号を有する３つの給電光１１２Ｄを出力させる。３つの給電光１１２Ｄは、互いに異なる信号が重畳されたものであれば特に限定されず、その信号は例えば単一の送信データから生成されたものなどであってもよい。
　３つの給光装置１５０Ｄから出力された３つの給電光１１２Ｄは、光ファイバーケーブル２００Ｃのコア２１０Ｃに出力される。 The first data communication device 100D includes three light supply devices 150D and a light supply control unit 160D.
Each of the three light feeders 150D includes a power feeding semiconductor laser 111D.
The light supply control unit 160D controls three light supply devices 150D, modulates the laser light from each of the power feeding semiconductor lasers 111D, and outputs three feeding lights 112D having different signals. The three feeding lights 112D are not particularly limited as long as signals different from each other are superimposed, and the signals may be, for example, those generated from a single transmission data.
The three feeding lights 112D output from the three light supply devices 150D are output to the core 210C of the optical fiber cable 200C.
　第２のデータ通信装置３００Ｄは、３つの受光装置３６０Ｄと、電力合成部３７０Ｄと、データ処理ユニット３４０Ｄとを含む。
　３つの受光装置３６０Ｄの各々には、３つの給光装置１５０Ｄからの３つの給電光１１２Ｄが光ファイバーケーブル２００Ｃでの伝送を通じて分散された給電光３１２Ｄが入力される。つまり、各受光装置３６０Ｄには、互いに異なる信号が重畳された３つの給電光１１２Ｄを含んだ給電光３１２Ｄが伝送される。各受光装置３６０Ｄの光電変換素子３１１Ｄは、伝送されてきた給電光３１２Ｄを電力に変換する。 The second data communication device 300D includes three light receiving devices 360D, a power synthesis unit 370D, and a data processing unit 340D.
Each of the three light receiving devices 360D is input with the feeding light 312D in which the three feeding lights 112D from the three light feeding devices 150D are distributed through the transmission by the optical fiber cable 200C. That is, the feeding light 312D including the three feeding lights 112D on which different signals are superimposed is transmitted to each light receiving device 360D. The photoelectric conversion element 311D of each light receiving device 360D converts the transmitted feed light 312D into electric power.
　電力合成部３７０Ｄは、３つの受光装置３６０Ｄ（光電変換素子３１１Ｄ）により給電光３１２Ｄから変換された電力を合成し、負荷へ供給する。負荷は、第２のデータ通信装置３００Ｄ内の各機器であってもよいし、外部機器であってもよい。 The power synthesis unit 370D synthesizes the power converted from the feed light 312D by the three light receiving devices 360D (photoelectric conversion element 311D) and supplies the power to the load. The load may be each device in the second data communication device 300D, or may be an external device.
　データ処理ユニット３４０Ｄは、３つの給電光３１２Ｄを復調し、重畳されていた３つの信号（情報）を取得する。そして、データ処理ユニット３４０Ｄは、取得した信号に基づいて、例えば行列演算による信号分離処理を行い、３つの給光装置１５０Ｄから出力された各給電光１１２Ｄに重畳した信号を求める。
　すなわち、第１のデータ通信装置１００Ｄと第２のデータ通信装置３００Ｄとの間では、３つの給光装置１５０Ｄと３つの受光装置３６０Ｄとを用い、給電を行いつつＭＩＭＯ通信が行われる。
　これにより、各々単一の給光装置及び受光装置を用いる場合に比べて給電量を増加させつつ、通信系統を用いることなくデータ通信を行うことができる。 The data processing unit 340D demodulates the three feeding lights 312D and acquires the three superimposed signals (information). Then, the data processing unit 340D performs signal separation processing by, for example, matrix calculation based on the acquired signal, and obtains a signal superimposed on each feeding light 112D output from the three light supply devices 150D.
That is, between the first data communication device 100D and the second data communication device 300D, MIMO communication is performed while supplying power using three light supply devices 150D and three light receiving devices 360D.
As a result, data communication can be performed without using a communication system while increasing the amount of power supply as compared with the case where a single light supply device and light receiving device are used.
　以上本開示の実施形態を説明したが、この実施形態は、例として示したものであり、この他の様々な形態で実施が可能であり、発明の要旨を逸脱しない範囲で、構成要素の省略、置き換え、変更を行うことができる。
　例えば、上記第３、第４実施形態では、給光装置及び受光装置が各々３つ設けられることとしたが、給光装置及び受光装置の数量は特に限定されない。ただし、これらの数量が互いに対応していることが好ましい。 Although the embodiments of the present disclosure have been described above, this embodiment is shown as an example, and can be implemented in various other embodiments, and components are omitted as long as the gist of the invention is not deviated. , Can be replaced or changed.
For example, in the third and fourth embodiments, three light supply devices and three light receiving devices are provided, but the number of the light supply device and the light receiving device is not particularly limited. However, it is preferable that these quantities correspond to each other.
　以上のように、本発明に係る光伝送システムは、従来に比べて通信速度を向上させるのに有用である。 As described above, the optical transmission system according to the present invention is useful for improving the communication speed as compared with the conventional one.
１Ａ　　光ファイバー伝送システム（光伝送システム）
１　　　光ファイバー伝送システム（光伝送システム）
１Ｂ　　光ファイバー伝送システム（光伝送システム）
１Ｃ　　光ファイバー伝送システム（光伝送システム）
１Ｄ　　光ファイバー伝送システム（光伝送システム）
１００　第１のデータ通信装置
１００Ｃ　第１のデータ通信装置
１００Ｄ　第１のデータ通信装置
１１１　　給電用半導体レーザー
１１１Ｄ　給電用半導体レーザー
１１２　　給電光
１１２Ｄ　給電光
１２１　　信号用半導体レーザー
１２１Ｃ　信号用半導体レーザー
１２５　　信号光
１２５Ｃ　信号光
１５０　　給光装置
１５０Ｄ　給光装置
１６０　　給光制御部
１６０Ｄ　給光制御部
２００　　光ファイバーケーブル
２００Ａ　光ファイバーケーブル
２００Ｂ　光ファイバーケーブル
２００Ｃ　光ファイバーケーブル
２１０　　コア
２１０Ｃ　コア
２５０　　光ファイバー
２５０Ａ　光ファイバー
２５０Ｃ　光ファイバー
３００　　第２のデータ通信装置
３００Ｃ　第２のデータ通信装置
３００Ｄ　第２のデータ通信装置
３１１　　光電変換素子
３１１Ｄ　光電変換素子
３１２Ｄ　給電光
３２５　　信号光
３２５Ｃ　信号光
３３１　　信号用フォトダイオード
３３１Ｃ　信号用フォトダイオード
３４０　　データ処理ユニット
３４０Ｃ　データ処理ユニット
３４０Ｄ　データ処理ユニット
３６０　　受光装置
３６０Ｄ　受光装置
３７０Ｄ　電力合成部
Ｐ　　　　粉体材料 1A Optical fiber transmission system (optical transmission system)
1 Optical fiber transmission system (optical transmission system)
1B Optical fiber transmission system (optical transmission system)
1C optical fiber transmission system (optical transmission system)
1D optical fiber transmission system (optical transmission system)
100 First data communication device 100C First data communication device 100D First data communication device 111 Power supply semiconductor laser 111D Power supply semiconductor laser 112 Power supply light 112D Power supply light 121 Signal semiconductor laser 121C Signal semiconductor laser 125 Signal light 125C signal light 150 light supply device 150D light supply device 160 light supply control unit 160D light supply control unit 200 optical fiber cable 200A optical fiber cable 200B optical fiber cable 200C optical fiber cable 210 core 210C core 250 optical fiber 250A optical fiber 250C optical fiber 300 second data communication device 300C Second data communication device 300D Second data communication device 311 Photoelectric conversion element 311D Photoelectric conversion element 312D Feed light 325 Signal light 325C Signal light 331 Signal photodiode 331C Signal photodiode 340 Data processing unit 340C Data processing unit 340D Data processing unit 360 Light receiving device 360D Light receiving device 370D Power synthesis unit P Powder material

Claims (4)

  1. 　信号光を出力する複数の給光装置と、信号光を受ける複数の受光装置と、信号光を伝送する光ファイバーケーブルと、を備える光伝送システムであって、
    　前記複数の給光装置から出力させた互いに異なる信号を有する複数の信号光を、前記光ファイバーケーブルの単一のコア又はクラッドを通じて前記複数の受光装置で受けて、ＭＩＭＯ通信を行う、
    　光伝送システム。     An optical transmission system including a plurality of light supply devices for outputting signal light, a plurality of light receiving devices for receiving signal light, and an optical fiber cable for transmitting signal light.
    A plurality of signal lights having different signals output from the plurality of light supply devices are received by the plurality of light receiving devices through a single core or cladding of the optical fiber cable, and MIMO communication is performed.
    Optical transmission system.
  2. 　前記光ファイバーケーブルは、信号光を伝送するコア又はクラッドに、光を拡散させる粉体材料が混合されている、
    　請求項１に記載の光伝送システム。     In the optical fiber cable, a powder material that diffuses light is mixed in a core or a cladding that transmits signal light.
    The optical transmission system according to claim 1.
  3. 　前記複数の受光装置は、伝送された信号光を電気信号に復調し、
    　前記複数の受光装置により復調された信号に基づいて信号分離処理を行い、前記複数の給光装置から出力された信号光が有する信号を求めるデータ処理部を備える、
    　請求項１又は請求項２に記載の光伝送システム。     The plurality of light receiving devices demodulate the transmitted signal light into an electric signal.
    A data processing unit that performs signal separation processing based on signals demodulated by the plurality of light receiving devices and obtains a signal possessed by signal light output from the plurality of light supply devices is provided.
    The optical transmission system according to claim 1 or 2.
  4. 　前記信号光は給電光であり、
    　前記複数の給光装置は、変調により互いに異なる信号が重畳された複数の給電光を出力し、
    　前記複数の受光装置は、伝送された複数の給電光を電力に変換し、
    　前記複数の受光装置により変換された電力を合成する電力合成部と、
    　前記複数の受光装置が受けた複数の給電光に重畳された複数の信号を取得し、当該複数の信号に基づいて、前記複数の給光装置により給電光に重畳された信号を求めるデータ処理部と、を備える、
    　請求項１又は請求項２に記載の光伝送システム。     The signal light is a feeding light and is
    The plurality of light feeding devices output a plurality of feeding lights on which signals different from each other are superimposed by modulation.
    The plurality of light receiving devices convert the plurality of transmitted light feeds into electric power.
    A power synthesizer that synthesizes the power converted by the plurality of light receiving devices, and
    A data processing unit that acquires a plurality of signals superimposed on a plurality of feed lights received by the plurality of light receiving devices and obtains a signal superimposed on the feed light by the plurality of light supply devices based on the plurality of signals. And with
    The optical transmission system according to claim 1 or 2.
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